code: def testZero(self):
      inputSize = 512
      numCoeffs = 20
      expected = [
          -2.29359070e02,
          -1.38243276e-03,
          -4.49713528e-01,
          4.14732238e-03,
          4.49690998e-01,
          -6.91174902e-03,
          -4.49645758e-01,
          9.67658963e-03,
          4.49589103e-01,
          -1.24400388e-02,
          -4.49509650e-01,
          1.52042406e-02,
          4.49419141e-01,
          -1.79666542e-02,
          -4.49305773e-01,
          2.07295977e-02,
          4.49181348e-01,
          -2.34902110e-02,
          -4.49033886e-01,
          2.62518562e-02,
      ]
      spec = zeros(inputSize)
      panning = Panning(numCoeffs=numCoeffs)(spec, spec)
      self.assertAlmostEqualVector(panning[0], expected, 5e-4)
  
file_path: essentia/test/src/unittests/standard/test_panning.py
imports: from essentia_test import *
  from math import log
label_desc: Use image node_id 3 for calling the TestPanning obj's underlying member method code with example usage: obj.testZero() without return types